Merge branch 'master' of git@github.com:jwise/netwatch

[netwatch.git] / ich2 / smram-ich2.c

diff --git a/ich2/smram-ich2.c b/ich2/smram-ich2.c
index d274c852028c497e932e91d4aa2df572bcbae605..044191429b54458bfca85eb1b9bdfc7e54f3f358 100644 (file)
--- a/ich2/smram-ich2.c
+++ b/ich2/smram-ich2.c
@@ -1,9 +1,18 @@
+/* smram-ich2.c
+ * SMRAM access utility for ICH2 chipset
+ * NetWatch system management mode administration console
+ *
+ * Copyright (c) 2008 Jacob Potter and Joshua Wise.  All rights reserved.
+ * This program is free software; you can redistribute and/or modify it under
+ * the terms found in the file LICENSE in the root of this source tree. 
+ *
+ */
+
+
 #include "reg-82815.h"
 #include <pci.h>
 #include <smram.h>
 
-#ifndef __RAW__
-
 static unsigned long memsz[] = {
        0,                      // 0
        32*1024*1024,           // 1
@@ -23,6 +32,44 @@ static unsigned long memsz[] = {
        512*1024*1024           // F
 };
 
+unsigned int smram_tseg_length(void) {
+       unsigned char smramc;
+       int usmm;
+
+       smramc = pci_read8(0, 0, 0, SMRAMC);
+
+       usmm = (smramc >> 4) & 0x3;
+
+       switch (usmm)
+       {
+       case 0:
+               return 0;
+       case 1:
+               return 0;
+       case 2:
+               return 512 * 1024;
+       case 3:
+               return 1024 * 1024;
+       }
+       return 0;
+}
+       
+void * smram_tseg_start(void) {
+       unsigned char drp, drp2;
+       unsigned int tom = 0;
+
+       drp = pci_read8(0, 0, 0, DRP);
+       drp2 = pci_read8(0, 0, 0, DRP2);
+
+       tom += memsz[drp & 0xF];
+       tom += memsz[drp >> 4];
+       tom += memsz[drp2 & 0xF];
+
+       return (void *)(tom - smram_tseg_length());
+}
+
+#ifndef __RAW__
+
 void smram_aseg_dump(void) {
 
        unsigned char smramc, drp, drp2;
@@ -102,7 +149,7 @@ int smram_aseg_set_state (int open) {
 
        if (smram_locked())
                return -1;
-               
+
        smramc = pci_read8(0, 0, 0, SMRAMC);
 
        switch (open)
@@ -127,3 +174,25 @@ int smram_aseg_set_state (int open) {
 
        return 0;
 }
+
+int smram_tseg_set_state (int open) {
+       unsigned char smramc;
+
+       if (smram_locked())
+               return -1;
+               
+       smramc = pci_read8(0, 0, 0, SMRAMC);
+
+       switch (open)
+       {
+       case SMRAM_TSEG_OPEN:
+               smramc = (smramc & 0x8F) | 0x00;
+               break;
+       default:
+               return -1;
+       }
+
+       pci_write8(0, 0, 0, SMRAMC, smramc);
+
+       return 0;
+}